package com.example.design.bilibili.facade;

public class Stereo {

    private static Stereo instance = new Stereo();

    public static Stereo getInstance(){

        return instance;
    }


    public void on(){
        System.out.println("Stereo on");
    }

    public void off(){
        System.out.println("Stereo off");
    }

    public void up(){
        System.out.println("Screen up");
    }
}
